/**
  ******************************************************************************
  * @file    system_stm32f4xx.c
  * @author  MCD Application Team
  * @brief   CMSIS Cortex-M4 Device Peripheral Access Layer System Source File.
  *
  *   This file provides two functions and one global variable to be called from
  *   user application:
  *      - SystemInit(): This function is called at startup just after reset and
  *                      before branch to main program. This call is made inside
  *                      the "startup_stm32f4xx.s" file.
  *
  *      - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
  *                                  by the user application to setup the SysTick
  *                                  timer or configure other parameters.
  *
  *      - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
  *                                 be called whenever the core clock is changed
  *                                 during program execution.
  *
  *
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/** @addtogroup CMSIS
  * @{
  */

/** @addtogroup stm32f4xx_system
  * @{
  */

/** @addtogroup STM32F4xx_System_Private_Includes
  * @{
  */


#include "stm32f4xx.h"

#if !defined  (HSE_VALUE)
#define HSE_VALUE    ((uint32_t)25000000) /*!< Default value of the External oscillator in Hz */
#endif /* HSE_VALUE */

#if !defined  (HSI_VALUE)
#define HSI_VALUE    ((uint32_t)16000000) /*!< Value of the Internal oscillator in Hz*/
#endif /* HSI_VALUE */

/**
  * @}
  */

/** @addtogroup STM32F4xx_System_Private_TypesDefinitions
  * @{
  */

/**
  * @}
  */

/** @addtogroup STM32F4xx_System_Private_Defines
  * @{
  */

/************************* Miscellaneous Configuration ************************/
/*!< Uncomment the following line if you need to use external SRAM or SDRAM as data memory  */
#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx)\
 || defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)\
 || defined(STM32F469xx) || defined(STM32F479xx) || defined(STM32F412Zx) || defined(STM32F412Vx)
/* #define DATA_IN_ExtSRAM */
#endif /* STM32F40xxx || STM32F41xxx || STM32F42xxx || STM32F43xxx || STM32F469xx || STM32F479xx ||\
          STM32F412Zx || STM32F412Vx */

#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)\
 || defined(STM32F446xx) || defined(STM32F469xx) || defined(STM32F479xx)
/* #define DATA_IN_ExtSDRAM */
#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F446xx || STM32F469xx ||\
          STM32F479xx */

/*!< Uncomment the following line if you need to relocate your vector Table in
     Internal SRAM. */
/* #define VECT_TAB_SRAM */
#define VECT_TAB_OFFSET  0x00 /*!< Vector Table base offset field. 
                                   This value must be a multiple of 0x200. */
/******************************************************************************/

/**
  * @}
  */

/** @addtogroup STM32F4xx_System_Private_Macros
  * @{
  */

/**
  * @}
  */

/** @addtogroup STM32F4xx_System_Private_Variables
  * @{
  */
/* This variable is updated in three ways:
    1) by calling CMSIS function SystemCoreClockUpdate()
    2) by calling HAL API function HAL_RCC_GetHCLKFreq()
    3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
       Note: If you use this function to configure the system clock; then there
             is no need to call the 2 first functions listed above, since SystemCoreClock
             variable is updated automatically.
*/
uint32_t SystemCoreClock = 16000000;
const uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
const uint8_t APBPrescTable[8]  = {0, 0, 0, 0, 1, 2, 3, 4};
/**
  * @}
  */

/** @addtogroup STM32F4xx_System_Private_FunctionPrototypes
  * @{
  */

#if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM)
static void SystemInit_ExtMemCtl(void);
#endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */

/**
  * @}
  */

/** @addtogroup STM32F4xx_System_Private_Functions
  * @{
  */

/**
  * @brief  Setup the microcontroller system
  *         Initialize the FPU setting, vector table location and External memory
  *         configuration.
  * @param  None
  * @retval None
  */
void SystemInit(void)
{
	/* FPU settings ------------------------------------------------------------*/
#if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
	SCB->CPACR |= ((3UL << 10*2)|(3UL <<
				      11*2));  /* set CP10 and CP11 Full Access */
#endif

#if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM)
	SystemInit_ExtMemCtl();
#endif /* DATA_IN_ExtSRAM || DATA_IN_ExtSDRAM */

	/* Configure the Vector Table location add offset address ------------------*/
#ifdef VECT_TAB_SRAM
	SCB->VTOR = SRAM_BASE |
		    VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM */
#else
	SCB->VTOR = FLASH_BASE |
		    VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH */
#endif
}

/**
   * @brief  Update SystemCoreClock variable according to Clock Register Values.
  *         The SystemCoreClock variable contains the core clock (HCLK), it can
  *         be used by the user application to setup the SysTick timer or configure
  *         other parameters.
  *
  * @note   Each time the core clock (HCLK) changes, this function must be called
  *         to update SystemCoreClock variable value. Otherwise, any configuration
  *         based on this variable will be incorrect.
  *
  * @note   - The system frequency computed by this function is not the real
  *           frequency in the chip. It is calculated based on the predefined
  *           constant and the selected clock source:
  *
  *           - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
  *
  *           - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
  *
  *           - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**)
  *             or HSI_VALUE(*) multiplied/divided by the PLL factors.
  *
  *         (*) HSI_VALUE is a constant defined in stm32f4xx_hal_conf.h file (default value
  *             16 MHz) but the real value may vary depending on the variations
  *             in voltage and temperature.
  *
  *         (**) HSE_VALUE is a constant defined in stm32f4xx_hal_conf.h file (its value
  *              depends on the application requirements), user has to ensure that HSE_VALUE
  *              is same as the real frequency of the crystal used. Otherwise, this function
  *              may have wrong result.
  *
  *         - The result of this function could be not correct when using fractional
  *           value for HSE crystal.
  *
  * @param  None
  * @retval None
  */
void SystemCoreClockUpdate(void)
{
	uint32_t tmp = 0, pllvco = 0, pllp = 2, pllsource = 0, pllm = 2;

	/* Get SYSCLK source -------------------------------------------------------*/
	tmp = RCC->CFGR & RCC_CFGR_SWS;

	switch (tmp) {
	case 0x00:  /* HSI used as system clock source */
		SystemCoreClock = HSI_VALUE;
		break;
	case 0x04:  /* HSE used as system clock source */
		SystemCoreClock = HSE_VALUE;
		break;
	case 0x08:  /* PLL used as system clock source */

		/* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLL_M) * PLL_N
		   SYSCLK = PLL_VCO / PLL_P
		   */
		pllsource = (RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) >> 22;
		pllm = RCC->PLLCFGR & RCC_PLLCFGR_PLLM;

		if (pllsource != 0) {
			/* HSE used as PLL clock source */
			pllvco = (HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6);
		} else {
			/* HSI used as PLL clock source */
			pllvco = (HSI_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6);
		}

		pllp = (((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) >>16) + 1 ) *2;
		SystemCoreClock = pllvco/pllp;
		break;
	default:
		SystemCoreClock = HSI_VALUE;
		break;
	}
	/* Compute HCLK frequency --------------------------------------------------*/
	/* Get HCLK prescaler */
	tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
	/* HCLK frequency */
	SystemCoreClock >>= tmp;
}

#if defined (DATA_IN_ExtSRAM) && defined (DATA_IN_ExtSDRAM)
#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)\
 || defined(STM32F469xx) || defined(STM32F479xx)
/**
  * @brief  Setup the external memory controller.
  *         Called in startup_stm32f4xx.s before jump to main.
  *         This function configures the external memories (SRAM/SDRAM)
  *         This SRAM/SDRAM will be used as program data memory (including heap and stack).
  * @param  None
  * @retval None
  */
void SystemInit_ExtMemCtl(void)
{
	__IO uint32_t tmp = 0x00;

	register uint32_t tmpreg = 0, timeout = 0xFFFF;
	register __IO uint32_t index;

	/* Enable GPIOC, GPIOD, GPIOE, GPIOF, GPIOG, GPIOH and GPIOI interface clock */
	RCC->AHB1ENR |= 0x000001F8;

	/* Delay after an RCC peripheral clock enabling */
	tmp = READ_BIT(RCC->AHB1ENR, RCC_AHB1ENR_GPIOCEN);

	/* Connect PDx pins to FMC Alternate function */
	GPIOD->AFR[0]  = 0x00CCC0CC;
	GPIOD->AFR[1]  = 0xCCCCCCCC;
	/* Configure PDx pins in Alternate function mode */
	GPIOD->MODER   = 0xAAAA0A8A;
	/* Configure PDx pins speed to 100 MHz */
	GPIOD->OSPEEDR = 0xFFFF0FCF;
	/* Configure PDx pins Output type to push-pull */
	GPIOD->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PDx pins */
	GPIOD->PUPDR   = 0x00000000;

	/* Connect PEx pins to FMC Alternate function */
	GPIOE->AFR[0]  = 0xC00CC0CC;
	GPIOE->AFR[1]  = 0xCCCCCCCC;
	/* Configure PEx pins in Alternate function mode */
	GPIOE->MODER   = 0xAAAA828A;
	/* Configure PEx pins speed to 100 MHz */
	GPIOE->OSPEEDR = 0xFFFFC3CF;
	/* Configure PEx pins Output type to push-pull */
	GPIOE->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PEx pins */
	GPIOE->PUPDR   = 0x00000000;

	/* Connect PFx pins to FMC Alternate function */
	GPIOF->AFR[0]  = 0xCCCCCCCC;
	GPIOF->AFR[1]  = 0xCCCCCCCC;
	/* Configure PFx pins in Alternate function mode */
	GPIOF->MODER   = 0xAA800AAA;
	/* Configure PFx pins speed to 50 MHz */
	GPIOF->OSPEEDR = 0xAA800AAA;
	/* Configure PFx pins Output type to push-pull */
	GPIOF->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PFx pins */
	GPIOF->PUPDR   = 0x00000000;

	/* Connect PGx pins to FMC Alternate function */
	GPIOG->AFR[0]  = 0xCCCCCCCC;
	GPIOG->AFR[1]  = 0xCCCCCCCC;
	/* Configure PGx pins in Alternate function mode */
	GPIOG->MODER   = 0xAAAAAAAA;
	/* Configure PGx pins speed to 50 MHz */
	GPIOG->OSPEEDR = 0xAAAAAAAA;
	/* Configure PGx pins Output type to push-pull */
	GPIOG->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PGx pins */
	GPIOG->PUPDR   = 0x00000000;

	/* Connect PHx pins to FMC Alternate function */
	GPIOH->AFR[0]  = 0x00C0CC00;
	GPIOH->AFR[1]  = 0xCCCCCCCC;
	/* Configure PHx pins in Alternate function mode */
	GPIOH->MODER   = 0xAAAA08A0;
	/* Configure PHx pins speed to 50 MHz */
	GPIOH->OSPEEDR = 0xAAAA08A0;
	/* Configure PHx pins Output type to push-pull */
	GPIOH->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PHx pins */
	GPIOH->PUPDR   = 0x00000000;

	/* Connect PIx pins to FMC Alternate function */
	GPIOI->AFR[0]  = 0xCCCCCCCC;
	GPIOI->AFR[1]  = 0x00000CC0;
	/* Configure PIx pins in Alternate function mode */
	GPIOI->MODER   = 0x0028AAAA;
	/* Configure PIx pins speed to 50 MHz */
	GPIOI->OSPEEDR = 0x0028AAAA;
	/* Configure PIx pins Output type to push-pull */
	GPIOI->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PIx pins */
	GPIOI->PUPDR   = 0x00000000;

	/*-- FMC Configuration -------------------------------------------------------*/
	/* Enable the FMC interface clock */
	RCC->AHB3ENR |= 0x00000001;
	/* Delay after an RCC peripheral clock enabling */
	tmp = READ_BIT(RCC->AHB3ENR, RCC_AHB3ENR_FMCEN);

	FMC_Bank5_6->SDCR[0] = 0x000019E4;
	FMC_Bank5_6->SDTR[0] = 0x01115351;

	/* SDRAM initialization sequence */
	/* Clock enable command */
	FMC_Bank5_6->SDCMR = 0x00000011;
	tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
	while((tmpreg != 0) && (timeout-- > 0)) {
		tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
	}

	/* Delay */
	for (index = 0; index<1000; index++);

	/* PALL command */
	FMC_Bank5_6->SDCMR = 0x00000012;
	timeout = 0xFFFF;
	while((tmpreg != 0) && (timeout-- > 0)) {
		tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
	}

	/* Auto refresh command */
	FMC_Bank5_6->SDCMR = 0x00000073;
	timeout = 0xFFFF;
	while((tmpreg != 0) && (timeout-- > 0)) {
		tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
	}

	/* MRD register program */
	FMC_Bank5_6->SDCMR = 0x00046014;
	timeout = 0xFFFF;
	while((tmpreg != 0) && (timeout-- > 0)) {
		tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
	}

	/* Set refresh count */
	tmpreg = FMC_Bank5_6->SDRTR;
	FMC_Bank5_6->SDRTR = (tmpreg | (0x0000027C<<1));

	/* Disable write protection */
	tmpreg = FMC_Bank5_6->SDCR[0];
	FMC_Bank5_6->SDCR[0] = (tmpreg & 0xFFFFFDFF);

#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)
	/* Configure and enable Bank1_SRAM2 */
	FMC_Bank1->BTCR[2]  = 0x00001011;
	FMC_Bank1->BTCR[3]  = 0x00000201;
	FMC_Bank1E->BWTR[2] = 0x0fffffff;
#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */
#if defined(STM32F469xx) || defined(STM32F479xx)
	/* Configure and enable Bank1_SRAM2 */
	FMC_Bank1->BTCR[2]  = 0x00001091;
	FMC_Bank1->BTCR[3]  = 0x00110212;
	FMC_Bank1E->BWTR[2] = 0x0fffffff;
#endif /* STM32F469xx || STM32F479xx */

	(void)(tmp);
}
#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F469xx || STM32F479xx */
#elif defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM)
/**
  * @brief  Setup the external memory controller.
  *         Called in startup_stm32f4xx.s before jump to main.
  *         This function configures the external memories (SRAM/SDRAM)
  *         This SRAM/SDRAM will be used as program data memory (including heap and stack).
  * @param  None
  * @retval None
  */
void SystemInit_ExtMemCtl(void)
{
	__IO uint32_t tmp = 0x00;
#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)\
 || defined(STM32F446xx) || defined(STM32F469xx) || defined(STM32F479xx)
#if defined (DATA_IN_ExtSDRAM)
	register uint32_t tmpreg = 0, timeout = 0xFFFF;
	register __IO uint32_t index;

#if defined(STM32F446xx)
	/* Enable GPIOA, GPIOC, GPIOD, GPIOE, GPIOF, GPIOG interface
	    clock */
	RCC->AHB1ENR |= 0x0000007D;
#else
	/* Enable GPIOC, GPIOD, GPIOE, GPIOF, GPIOG, GPIOH and GPIOI interface
	    clock */
	RCC->AHB1ENR |= 0x000001F8;
#endif /* STM32F446xx */
	/* Delay after an RCC peripheral clock enabling */
	tmp = READ_BIT(RCC->AHB1ENR, RCC_AHB1ENR_GPIOCEN);

#if defined(STM32F446xx)
	/* Connect PAx pins to FMC Alternate function */
	GPIOA->AFR[0]  |= 0xC0000000;
	GPIOA->AFR[1]  |= 0x00000000;
	/* Configure PDx pins in Alternate function mode */
	GPIOA->MODER   |= 0x00008000;
	/* Configure PDx pins speed to 50 MHz */
	GPIOA->OSPEEDR |= 0x00008000;
	/* Configure PDx pins Output type to push-pull */
	GPIOA->OTYPER  |= 0x00000000;
	/* No pull-up, pull-down for PDx pins */
	GPIOA->PUPDR   |= 0x00000000;

	/* Connect PCx pins to FMC Alternate function */
	GPIOC->AFR[0]  |= 0x00CC0000;
	GPIOC->AFR[1]  |= 0x00000000;
	/* Configure PDx pins in Alternate function mode */
	GPIOC->MODER   |= 0x00000A00;
	/* Configure PDx pins speed to 50 MHz */
	GPIOC->OSPEEDR |= 0x00000A00;
	/* Configure PDx pins Output type to push-pull */
	GPIOC->OTYPER  |= 0x00000000;
	/* No pull-up, pull-down for PDx pins */
	GPIOC->PUPDR   |= 0x00000000;
#endif /* STM32F446xx */

	/* Connect PDx pins to FMC Alternate function */
	GPIOD->AFR[0]  = 0x000000CC;
	GPIOD->AFR[1]  = 0xCC000CCC;
	/* Configure PDx pins in Alternate function mode */
	GPIOD->MODER   = 0xA02A000A;
	/* Configure PDx pins speed to 50 MHz */
	GPIOD->OSPEEDR = 0xA02A000A;
	/* Configure PDx pins Output type to push-pull */
	GPIOD->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PDx pins */
	GPIOD->PUPDR   = 0x00000000;

	/* Connect PEx pins to FMC Alternate function */
	GPIOE->AFR[0]  = 0xC00000CC;
	GPIOE->AFR[1]  = 0xCCCCCCCC;
	/* Configure PEx pins in Alternate function mode */
	GPIOE->MODER   = 0xAAAA800A;
	/* Configure PEx pins speed to 50 MHz */
	GPIOE->OSPEEDR = 0xAAAA800A;
	/* Configure PEx pins Output type to push-pull */
	GPIOE->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PEx pins */
	GPIOE->PUPDR   = 0x00000000;

	/* Connect PFx pins to FMC Alternate function */
	GPIOF->AFR[0]  = 0xCCCCCCCC;
	GPIOF->AFR[1]  = 0xCCCCCCCC;
	/* Configure PFx pins in Alternate function mode */
	GPIOF->MODER   = 0xAA800AAA;
	/* Configure PFx pins speed to 50 MHz */
	GPIOF->OSPEEDR = 0xAA800AAA;
	/* Configure PFx pins Output type to push-pull */
	GPIOF->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PFx pins */
	GPIOF->PUPDR   = 0x00000000;

	/* Connect PGx pins to FMC Alternate function */
	GPIOG->AFR[0]  = 0xCCCCCCCC;
	GPIOG->AFR[1]  = 0xCCCCCCCC;
	/* Configure PGx pins in Alternate function mode */
	GPIOG->MODER   = 0xAAAAAAAA;
	/* Configure PGx pins speed to 50 MHz */
	GPIOG->OSPEEDR = 0xAAAAAAAA;
	/* Configure PGx pins Output type to push-pull */
	GPIOG->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PGx pins */
	GPIOG->PUPDR   = 0x00000000;

#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)\
 || defined(STM32F469xx) || defined(STM32F479xx)
	/* Connect PHx pins to FMC Alternate function */
	GPIOH->AFR[0]  = 0x00C0CC00;
	GPIOH->AFR[1]  = 0xCCCCCCCC;
	/* Configure PHx pins in Alternate function mode */
	GPIOH->MODER   = 0xAAAA08A0;
	/* Configure PHx pins speed to 50 MHz */
	GPIOH->OSPEEDR = 0xAAAA08A0;
	/* Configure PHx pins Output type to push-pull */
	GPIOH->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PHx pins */
	GPIOH->PUPDR   = 0x00000000;

	/* Connect PIx pins to FMC Alternate function */
	GPIOI->AFR[0]  = 0xCCCCCCCC;
	GPIOI->AFR[1]  = 0x00000CC0;
	/* Configure PIx pins in Alternate function mode */
	GPIOI->MODER   = 0x0028AAAA;
	/* Configure PIx pins speed to 50 MHz */
	GPIOI->OSPEEDR = 0x0028AAAA;
	/* Configure PIx pins Output type to push-pull */
	GPIOI->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PIx pins */
	GPIOI->PUPDR   = 0x00000000;
#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F469xx || STM32F479xx */

	/*-- FMC Configuration -------------------------------------------------------*/
	/* Enable the FMC interface clock */
	RCC->AHB3ENR |= 0x00000001;
	/* Delay after an RCC peripheral clock enabling */
	tmp = READ_BIT(RCC->AHB3ENR, RCC_AHB3ENR_FMCEN);

	/* Configure and enable SDRAM bank1 */
#if defined(STM32F446xx)
	FMC_Bank5_6->SDCR[0] = 0x00001954;
#else
	FMC_Bank5_6->SDCR[0] = 0x000019E4;
#endif /* STM32F446xx */
	FMC_Bank5_6->SDTR[0] = 0x01115351;

	/* SDRAM initialization sequence */
	/* Clock enable command */
	FMC_Bank5_6->SDCMR = 0x00000011;
	tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
	while((tmpreg != 0) && (timeout-- > 0)) {
		tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
	}

	/* Delay */
	for (index = 0; index<1000; index++);

	/* PALL command */
	FMC_Bank5_6->SDCMR = 0x00000012;
	timeout = 0xFFFF;
	while((tmpreg != 0) && (timeout-- > 0)) {
		tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
	}

	/* Auto refresh command */
#if defined(STM32F446xx)
	FMC_Bank5_6->SDCMR = 0x000000F3;
#else
	FMC_Bank5_6->SDCMR = 0x00000073;
#endif /* STM32F446xx */
	timeout = 0xFFFF;
	while((tmpreg != 0) && (timeout-- > 0)) {
		tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
	}

	/* MRD register program */
#if defined(STM32F446xx)
	FMC_Bank5_6->SDCMR = 0x00044014;
#else
	FMC_Bank5_6->SDCMR = 0x00046014;
#endif /* STM32F446xx */
	timeout = 0xFFFF;
	while((tmpreg != 0) && (timeout-- > 0)) {
		tmpreg = FMC_Bank5_6->SDSR & 0x00000020;
	}

	/* Set refresh count */
	tmpreg = FMC_Bank5_6->SDRTR;
#if defined(STM32F446xx)
	FMC_Bank5_6->SDRTR = (tmpreg | (0x0000050C<<1));
#else
	FMC_Bank5_6->SDRTR = (tmpreg | (0x0000027C<<1));
#endif /* STM32F446xx */

	/* Disable write protection */
	tmpreg = FMC_Bank5_6->SDCR[0];
	FMC_Bank5_6->SDCR[0] = (tmpreg & 0xFFFFFDFF);
#endif /* DATA_IN_ExtSDRAM */
#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F446xx || STM32F469xx || STM32F479xx */

#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx)\
 || defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)\
 || defined(STM32F469xx) || defined(STM32F479xx) || defined(STM32F412Zx) || defined(STM32F412Vx)

#if defined(DATA_IN_ExtSRAM)
	/*-- GPIOs Configuration -----------------------------------------------------*/
	/* Enable GPIOD, GPIOE, GPIOF and GPIOG interface clock */
	RCC->AHB1ENR   |= 0x00000078;
	/* Delay after an RCC peripheral clock enabling */
	tmp = READ_BIT(RCC->AHB1ENR, RCC_AHB1ENR_GPIODEN);

	/* Connect PDx pins to FMC Alternate function */
	GPIOD->AFR[0]  = 0x00CCC0CC;
	GPIOD->AFR[1]  = 0xCCCCCCCC;
	/* Configure PDx pins in Alternate function mode */
	GPIOD->MODER   = 0xAAAA0A8A;
	/* Configure PDx pins speed to 100 MHz */
	GPIOD->OSPEEDR = 0xFFFF0FCF;
	/* Configure PDx pins Output type to push-pull */
	GPIOD->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PDx pins */
	GPIOD->PUPDR   = 0x00000000;

	/* Connect PEx pins to FMC Alternate function */
	GPIOE->AFR[0]  = 0xC00CC0CC;
	GPIOE->AFR[1]  = 0xCCCCCCCC;
	/* Configure PEx pins in Alternate function mode */
	GPIOE->MODER   = 0xAAAA828A;
	/* Configure PEx pins speed to 100 MHz */
	GPIOE->OSPEEDR = 0xFFFFC3CF;
	/* Configure PEx pins Output type to push-pull */
	GPIOE->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PEx pins */
	GPIOE->PUPDR   = 0x00000000;

	/* Connect PFx pins to FMC Alternate function */
	GPIOF->AFR[0]  = 0x00CCCCCC;
	GPIOF->AFR[1]  = 0xCCCC0000;
	/* Configure PFx pins in Alternate function mode */
	GPIOF->MODER   = 0xAA000AAA;
	/* Configure PFx pins speed to 100 MHz */
	GPIOF->OSPEEDR = 0xFF000FFF;
	/* Configure PFx pins Output type to push-pull */
	GPIOF->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PFx pins */
	GPIOF->PUPDR   = 0x00000000;

	/* Connect PGx pins to FMC Alternate function */
	GPIOG->AFR[0]  = 0x00CCCCCC;
	GPIOG->AFR[1]  = 0x000000C0;
	/* Configure PGx pins in Alternate function mode */
	GPIOG->MODER   = 0x00085AAA;
	/* Configure PGx pins speed to 100 MHz */
	GPIOG->OSPEEDR = 0x000CAFFF;
	/* Configure PGx pins Output type to push-pull */
	GPIOG->OTYPER  = 0x00000000;
	/* No pull-up, pull-down for PGx pins */
	GPIOG->PUPDR   = 0x00000000;

	/*-- FMC/FSMC Configuration --------------------------------------------------*/
	/* Enable the FMC/FSMC interface clock */
	RCC->AHB3ENR         |= 0x00000001;

#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)
	/* Delay after an RCC peripheral clock enabling */
	tmp = READ_BIT(RCC->AHB3ENR, RCC_AHB3ENR_FMCEN);
	/* Configure and enable Bank1_SRAM2 */
	FMC_Bank1->BTCR[2]  = 0x00001011;
	FMC_Bank1->BTCR[3]  = 0x00000201;
	FMC_Bank1E->BWTR[2] = 0x0fffffff;
#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */
#if defined(STM32F469xx) || defined(STM32F479xx)
	/* Delay after an RCC peripheral clock enabling */
	tmp = READ_BIT(RCC->AHB3ENR, RCC_AHB3ENR_FMCEN);
	/* Configure and enable Bank1_SRAM2 */
	FMC_Bank1->BTCR[2]  = 0x00001091;
	FMC_Bank1->BTCR[3]  = 0x00110212;
	FMC_Bank1E->BWTR[2] = 0x0fffffff;
#endif /* STM32F469xx || STM32F479xx */
#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx)|| defined(STM32F417xx)\
   || defined(STM32F412Zx) || defined(STM32F412Vx)
	/* Delay after an RCC peripheral clock enabling */
	tmp = READ_BIT(RCC->AHB3ENR, RCC_AHB3ENR_FSMCEN);
	/* Configure and enable Bank1_SRAM2 */
	FSMC_Bank1->BTCR[2]  = 0x00001011;
	FSMC_Bank1->BTCR[3]  = 0x00000201;
	FSMC_Bank1E->BWTR[2] = 0x0FFFFFFF;
#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F412Zx || STM32F412Vx */

#endif /* DATA_IN_ExtSRAM */
#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F427xx || STM32F437xx ||\
          STM32F429xx || STM32F439xx || STM32F469xx || STM32F479xx || STM32F412Zx || STM32F412Vx  */
	(void)(tmp);
}
#endif /* DATA_IN_ExtSRAM && DATA_IN_ExtSDRAM */
/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
